Abstract Improving the dynamic properties and reducing vibration levels is extremely important for design of many engineering structures. In this paper, we develop a topology optimization program based on parallel computing with help PETSc Portable Extension Toolkit Scientific Computing MPI communication protocol. The SIMP model used as model, sensitivity analysis schemes compliance displacemen...

Sound propagating inside a room is multiply scattered by the boundaries and other obstacles, forming complex reverberating sound field (RSF). Such RSFs are not only spatially disordered but also temporally scrambled. Although spatial control of steady-state at single frequencies successfully achieved extending idea wavefront shaping to acoustics, time-coherent polychromatic has remained out rea...

The transient dynamics of a beam mounted on springer-damper support and equipped with a nonlinear energy sink (NES) is investigated under the effects of shock loads. The equations of motion are derived using the Hamilton’s principle leading to four hybrid ordinary and partial differential equations and descritized using the Galerkin method. An adaptive Newmark method is employed for accurate an...

We investigate the isometric transient response of muscle using a quantitative stochastic model of the actomyosin cycle based on the swinging lever-arm hypothesis. We first consider a single pair of filaments, and show that when values of parameters such as the lever-arm displacement and the cross-bridge elasticity are chosen to provide effective energy transduction, the T(2) curve (the tension...